Ninth Blue Book unknown over the San Antonio military complex (1952)

Project Blue Book Case #1855. On August 7, 1952, another bright object was observed over San Antonio — the ninth Blue Book unknown from America's military aviation capital. Nine cases made San Antonio the all-time record holder among conventional military cities, surpassing even Albuquerque's nuclear corridor in total case count. The four-base complex of Lackland, Kelly, Randolph, and Brooks produced unknowns with a persistence that defied any explanation. The case was classified "Unknown."